Al-Harthi, Abbas Aifan Environmental impacts of the gypsum mining operation at Maqna area, Tabuk, Saudi Arabia - Berlin Springer-Verlag November 2001 - pp. 209-218 ilus., tbls. ISSN: 0943-0105 Subjects--Topical Terms: CONTAMINACION AMBIENTALEXPLOTACION DE CANTERASIMPACTO AMBIENTALYESO Subjects--Geographic Terms: ARABIA SAUDITA